Mesos_master Check

This check collects metrics for Mesos masters. For Mesos slave metrics, see the Mesos Slave integration.

Overview

This check collects metrics from Mesos masters for:

• Cluster resources
• Slaves registered, active, inactive, connected, disconnected, etc
• Number of tasks failed, finished, staged, running, etc
• Number of frameworks active, inactive, connected, and disconnected

And many more.

Setup

Installation

The installation is the same on Mesos with and without DC/OS. Run the datadog-agent container on each of your Mesos master nodes:

docker run -d --name datadog-agent \
  -v /var/run/docker.sock:/var/run/docker.sock:ro \
  -v /proc/:/host/proc/:ro \
  -v /sys/fs/cgroup/:/host/sys/fs/cgroup:ro \
  -e DD_API_KEY=<YOUR_DATADOG_API_KEY> \
  -e MESOS_MASTER=true \
  -e MARATHON_URL=http://leader.mesos:8080 \
  datadog/agent:latest

Substitute your Datadog API key and Mesos Master’s API URL into the command above.

Configuration

If you passed the correct Master URL when starting datadog-agent, the Agent is already using a default mesos_master.d/conf.yaml to collect metrics from your masters. See the sample mesos_master.d/conf.yaml for all available configuration options.

Unless your masters’ API uses a self-signed certificate. In that case, set disable_ssl_validation: true in mesos_master.d/conf.yaml.

Log collection

1. Collecting logs is disabled by default in the Datadog Agent, enable it in your datadog.yaml file:

   logs_enabled: true
   

2. Add this configuration block to your mesos_master.d/conf.yaml file to start collecting your Mesos logs:

   logs:
     - type: file
       path: /var/log/mesos/*
       source: mesos
   

   Change the path parameter value based on your environment, or use the default docker stdout:

   logs:
     - type: docker
       source: mesos
   

   See the sample mesos_master.d/conf.yaml for all available configuration options.

3. Restart the Agent.

To enable logs for Kubernetes environments, see Kubernetes Log Collection.

Validation

In Datadog, search for mesos.cluster in the Metrics Explorer.

Data Collected

Metrics

Events

The Mesos-master check does not include any events.

Service Checks

mesos_master.can_connect

Returns CRITICAL if the Agent cannot connect to the Mesos Master API to collect metrics, UNKNOWN if the master is not detected as the leader, otherwise OK.

Statuses: ok, critical, unknown

Troubleshooting

Need help? Contact Datadog support.

Further Reading

• Installing Datadog on Mesos with DC/OS